systemctl need to be accessible on switch-root, but we unmount the
squash image on switch-root, so it will fail. systemctl depends on a lot
of libraries, squash them can save more RAM. So allow modules
(eg. kdump) to tell dracut that switch-root will be intercepted,
then we don't need to take care of that.
Signed-off-by: Kairui Song <kasong@redhat.com>
The upcoming kernel will have a support for loading compressed
firmware files, and this patch corresponds to that kernel change.
When a firmware file with the extra .xz extension is found, dracut
copies to initrd as fallback. Since initrd itself is compressed, the
file is uncompressed in initrd beforehand.
Let the caller pass in the module path instead of try to find the module
path everytime. This helps optimize the overall runtime.
Test results (3 rounds) on Fedora 30 in KVM VM with 8 CPUs, 2G memory, HDD:
$ time ./dracut.sh --local --quiet --hostonly --hostonly-cmdline --hostonly-i18n --hostonly-mode 'strict' -o 'plymouth dash resume ifcfg' --mount '/dev/mapper/fedora-root /sysroot xfs defaults' --no-hostonly-default-device -f initramfs.img
Before the commit:
real 0m11.782s | real 0m11.505s | real 0m11.958s
user 0m9.169s | user 0m9.218s | user 0m9.327s
sys 0m10.839s | sys 0m10.829s | sys 0m10.925s
After this commit:
real 0m9.866s | real 0m9.580s | real 0m9.638s
user 0m9.048s | user 0m9.142s | user 0m9.120s
sys 0m7.411s | sys 0m7.775s | sys 0m7.745s
Test result of building a ordinary image:
$ time ./dracut.sh --local --quiet -f initramfs.img
Before the commit:
real 0m34.697s | real 0m34.371s | real 0m35.122s
user 0m27.608s | user 0m27.524s | user 0m27.705s
sys 0m22.341s | sys 0m22.032s | sys 0m22.246s
After the commit:
real 0m31.914s | real 0m31.006 | real 0m31.289ss
user 0m27.315s | user 0m27.324 | user 0m27.290ss
sys 0m19.051s | sys 0m18.916 | sys 0m19.022ss
This will have an ~2s speed up.
Signed-off-by: Kairui Song <kasong@redhat.com>
Add a new option --hostonly-mode which accept an <mode> parameter, so we have a tri-state hostonly mode:
* generic: by passing "--no-hostonly" or not passing anything.
"--hostonly-mode" has no effect in such case.
* sloppy: by passing "--hostonly --hostonly-mode sloppy". This
is also the default mode when only "--hostonly" is given.
* strict: by passing "--hostonly --hostonly-mode strict".
Sloppy mode is the original hostonly mode, the new introduced strict
mode will allow modules to ignore more drivers or do some extra job to
save memory and disk space, while making the image less portable.
Also introduced a helper function "optional_hostonly" to make it
easier for modules to leverage new hostonly mode.
To force install modules only in sloppy hostonly mode, use the form:
hostonly="$(optional_hostonly)" instmods <modules>
Signed-off-by: Kairui Song <kasong@redhat.com>
Error: SHELLCHECK_WARNING:
/usr/lib/dracut/dracut-init.sh:939:20: error: Argument to implicit -n is always true due to literal strings. [SC2157]
937| dracut_kernel_post() {
938| for _f in modules.builtin.bin modules.builtin modules.order; do
939|-> [[ $srcmods/$_f ]] && inst_simple "$srcmods/$_f" "/lib/modules/$kernel/$_f"
940| done
941|
Error: SHELLCHECK_WARNING:
/usr/lib/dracut/modules.d/98syslog/parse-syslog-opts.sh:18:12: error: This expression is constant. Did you forget a $ somewhere? [SC2078]
16| elif [ -e /sbin/syslogd ]; then
17| syslogtype="syslogd"
18|-> elif [ /sbin/syslog-ng ]; then
19| syslogtype="syslog-ng"
20| else
Error: SHELLCHECK_WARNING:
/usr/lib/dracut/modules.d/90crypt/crypt-lib.sh:15:29: error: Since you double quoted this, it will not word split, and the loop will only run once. [SC2066]
13| strstr "$d" "${luks##luks-}" && return 0
14| if [ -n "$dev" ]; then
15|-> for _dev in "$(devnames $d)"; do
16| [ "$dev" -ef "$_dev" ] && return 0
17| done
Allow filesystem modules to install a fs-specific text file with
instructions on what to do when mount fails. This is printed when we go into
an emergency shell.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Kairui Song